Attenuation is one of the principal indicators for measuring the effectiveness of electromagnetic interference shielding. It refers to the difference between an electromagnetic signal’s intensity before shielding and its intensity after shielding. Attenuation is marked in decibels (dB) that correspond to the ratio between field strength with and without the presence of a protective medium. The decrease in a signal’s intensity, or amplitude, is usually exponential with distance, while the decibel range falls along a logarithmic scale. This means that an attenuation rating of 50 dB indicates a shielding strength ten times that of 40 dB. In general, a shielding range of 10 to 30 dB provides the lowest effective level of shielding, while anything below that range can be considered little or no shielding. Shielding between 60 and 90 dB may be considered a high level of protection, while 90 to 120 dB is exceptional.

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Easy Installation

Shield Efficiency

Slip the RF Meter Shield over the smart meter's glass globe. Internal elastic securely holds the RF Meter Shield in place. RF Meter Shield Model: SX1000418 fits all smart meters up to a 6.5" diameter X 6.0" long (all smart meters currently manufactured). The elastic end of the RF Meter Shield can also be rolled-up to snuggly fit shorter glass globes (stays secure in wind gusts up to 110 MPH).

Description

The RF Meter Shield is woven with a special blend of metallic materials that absorb and restrict the emission of RF & EMF radiation. The RF Meter Shield together with your meter's existing metal enclosure form a protective barrier around the smart meter that reduces RF & EMF radiation by over 80%.